I aged 72 years underwent laparoscopic radical prostatectomy on 23 jan 21 and the biopsy report shows gleason score 8 (3+5) in pca 4th stage. Administered inj pamorelin 22.5 ng on 10 mar and continuing tab caluran 50 one daily. The result of psa test after first 3 months was 0.02 which raised to 0.09 after 2nd 3 months now. Kindly let me know whether it is considered as psa doubling and attracts the norm biochemical recurrence and returning of cancer will require more treatment.